CN211982224U - Electronic expansion valve circuit board is fixed and seal structure - Google Patents
Electronic expansion valve circuit board is fixed and seal structure Download PDFInfo
- Publication number
- CN211982224U CN211982224U CN202020654063.XU CN202020654063U CN211982224U CN 211982224 U CN211982224 U CN 211982224U CN 202020654063 U CN202020654063 U CN 202020654063U CN 211982224 U CN211982224 U CN 211982224U
- Authority
- CN
- China
- Prior art keywords
- circuit board
- shell
- groove
- expansion valve
- electronic expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Casings For Electric Apparatus (AREA)
Abstract
The utility model discloses a fixed and seal structure of electronic expansion valve circuit board, it relates to the electronic expansion valve field. The problem of electronic expansion valve fill with silica gel in moulding plastics the shell cavity, influence sealed effect, anti vibration effect and takt, and the apron of just moulding plastics needs to use ultrasonic bonding equipment, and welding leakproofness is difficult for guaranteeing is solved. The technical scheme is characterized by comprising a shell, a circuit board and a cover plate, wherein a positioning column penetrating through the circuit board is arranged in the shell, and the positioning column is fixedly connected with the circuit board after being partially melted; an annular sealing groove is formed in the end face of the shell, the inner end face of the cover plate is in contact with the end face of the shell, and a positioning part embedded into the sealing groove is arranged on the cover plate; location portion and seal groove inside wall all contactless, and the seal groove intussuseption is provided with the sealed glue with apron and casing fixed connection. The utility model discloses cancelled the use of silica gel and ultrasonic bonding equipment, reduced process cost and improved assembly efficiency, and the leakproofness of assurance circuit board that can be more reliable.
Description
Technical Field
The utility model relates to an electronic expansion valve field, more specifically say, it relates to a fixed and seal structure of electronic expansion valve circuit board.
Background
The electronic expansion valve is widely applied to household appliances and automobiles, the forefront structural form is an integrated circuit board, and the circuit board can also be accessed with Hall signals or pressure sensor signals and temperature sensor signals to realize intellectualization, particularly to electric automobiles.
In the existing scheme, an Lin communication terminal and a stator of a stepping motor are coated and molded into a whole, the whole also comprises an injection molding shell for installing a circuit board, and a leading-out terminal of the stepping motor and the Lin communication terminal are arranged in a cavity for installing the circuit board in the injection molding shell. The installation process is that the circuit board is installed in the cavity of the injection molding shell firstly, leading-out terminals and Lin communication terminals of the stepping motor penetrate through holes of the circuit board and protrude out, the circuit board is supported on boss surfaces at four corners, then the protruding terminals on the circuit board are subjected to tin soldering, then the cavity of the injection molding shell is filled with silica gel until all components on the circuit board are covered, and after the silica gel is solidified, the injection molding cover plate is welded on the injection molding shell through ultrasonic waves.
However, in the above scheme, the cavity of the injection molding shell needs to be filled with silica gel, the silica gel is easy to generate bubbles and the back of the circuit board is not easy to fill, so that the sealing effect and the anti-vibration effect are affected, and the production rhythm is affected because the silica gel is solidified for too long time which needs several hours; in addition, the apron of moulding plastics needs to use ultrasonic welding equipment, and the welding leakproofness is difficult for guaranteeing.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide an electronic expansion valve circuit board is fixed and seal structure, its use that has cancelled silica gel and ultrasonic welding equipment has reduced processing cost and has improved assembly efficiency, and the leakproofness of assurance circuit board that can be more reliable.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a circuit board fixing and sealing structure of an electronic expansion valve comprises a shell, a circuit board and a cover plate, wherein a plurality of positioning columns penetrating through the circuit board are arranged in the shell, and the positioning columns are fixedly connected with the circuit board after being partially melted;
the end face of the shell is provided with an annular sealing groove, the inner end face of the cover plate is in contact with the end face of the shell, and the cover plate is provided with a positioning part embedded in the sealing groove; the location portion with the seal groove inside wall all contactless, just the seal groove intussuseption is provided with apron and casing fixed connection's sealed glue.
Furthermore, a height difference is formed between the inner annular wall and the outer annular wall of the sealing groove, the inner end face of the cover plate is in contact with the end face, close to the inner annular wall of the sealing groove, of the shell, and the thickness of the inner end face of the cover plate is equal to the height difference.
Furthermore, an auxiliary ring groove communicated with the sealing groove is formed in the outer end face of the cover plate, and the sealing glue is arranged in the auxiliary ring groove.
Furthermore, be provided with on the location portion with seal groove inner annular wall is relative, and contactless abdication inclined plane.
Furthermore, a limiting groove is formed in the side wall of the circuit board, and a limiting column matched with the limiting groove is arranged on the inner side wall of the shell.
To sum up, the utility model discloses following beneficial effect has:
1. the circuit board is fixed by the positioning column in a hot-riveting mode, so that silica gel is not needed, the process cost can be reduced, and the assembly efficiency can be improved;
2. the limiting groove and the limiting column are adopted, so that the circuit board can be prevented from being reversely mounted;
3. after location portion embedding seal inslot, because it all contactless with the seal groove inside wall, then seal groove surplus cavity cross-section is the U type, packs sealed glue to the intussuseption of U type groove again, can effectively guarantee the leakproofness of circuit board, and the apron passes through sealed fixed connection with the casing simultaneously, can cancel ultrasonic welding equipment's use.
Drawings
FIG. 1 is a schematic view of an embodiment of a circuit board fixing and sealing structure of an electronic expansion valve;
FIG. 2 is a sectional view of a circuit board fixing and sealing structure of the electronic expansion valve in the embodiment;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is a schematic structural diagram of the housing and the circuit board in the embodiment.
In the figure: 1. a housing; 11. a sealing groove; 2. a cover plate; 21. a positioning part; 22. a abdication inclined plane; 23. an auxiliary ring groove; 3. a circuit board; 31. positioning holes; 32. a limiting groove; 4. sealing glue; 51. a positioning column; 52. a limiting column.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Example (b):
a circuit board fixing and sealing structure of an electronic expansion valve refers to fig. 1 to 4, and comprises a shell 1, a circuit board 3 and a cover plate 2; four positioning columns 51 penetrating through the circuit board 3 are arranged in the shell 1, and positioning holes 31 matched with the positioning columns 51 are formed in the circuit board 3; after the circuit board 3 is installed in the housing 1, the positioning columns 51 penetrate through the positioning holes 31, and then the four positioning columns 51 are contacted with the circuit board 3 through hot-mortise melting parts, so that the positioning columns 51 are fixedly connected with the circuit board 3, and the circuit board 3 is prevented from loosening; in this embodiment, the side wall of the circuit board 3 is provided with a limiting groove 32, the inner side wall of the housing 1 is provided with a limiting post 52 matched with the limiting groove 32, and the matching of the limiting post 52 and the limiting groove 32 can ensure that the circuit board 3 is correctly installed in the housing 1.
Referring to fig. 3, a square annular sealing groove 11 is formed in the end surface of the housing 1, the inner end surface of the cover plate 2 is in contact with the end surface of the housing 1, and a positioning portion 21 embedded in the sealing groove 11 is arranged on the cover plate 2; the positioning part 21 is not in contact with the inner side wall of the sealing groove 11, and the sealing groove 11 is filled with a sealant 4 fixedly connecting the cover plate 2 and the shell 1.
Referring to fig. 3, a height difference is formed between the inner annular wall and the outer annular wall of the seal groove 11, the inner end surface of the cover plate 2 is in contact with the end surface of the casing 1 close to the inner annular wall of the seal groove 11, and the thickness of the cover plate 2 is equal to the height difference; in the embodiment, an auxiliary ring groove 23 communicated with the seal groove 11 is formed in the outer end face of the cover plate 2, and a sealant 4 is filled in the auxiliary ring groove 23; the setting of supplementary annular 23 can increase the area of contact of sealed glue 4 with apron 2 on the one hand to improve the steadiness of connecting, on the other hand can increase the packing volume of sealed glue 4, prolong its life-span.
Referring to fig. 3, be provided with on location portion 21 and seal groove 11 inner annular wall relative, and contactless abdication inclined plane 22, abdication inclined plane 22's setting has guaranteed on the one hand that location portion 21 and seal groove 11 inside wall contactless, and on the other hand abdication inclined plane 22 and the contained angle that forms between the terminal surface in the apron 2 can play limiting displacement to improve apron 2's steadiness.
Claims (5)
1. The utility model provides a fixed and seal structure of electronic expansion valve circuit board, includes casing, circuit board and apron, its characterized in that: a plurality of positioning columns penetrating through the circuit board are arranged in the shell, and the positioning columns are fixedly connected with the circuit board after being partially melted;
the end face of the shell is provided with an annular sealing groove, the inner end face of the cover plate is in contact with the end face of the shell, and the cover plate is provided with a positioning part embedded in the sealing groove; the location portion with the seal groove inside wall all contactless, just the seal groove intussuseption is provided with apron and casing fixed connection's sealed glue.
2. A fixing and sealing structure for a circuit board of an electronic expansion valve according to claim 1, wherein: a height difference is formed between the inner annular wall and the outer annular wall of the sealing groove, the inner end face of the cover plate is in contact with the end face, close to the inner annular wall of the sealing groove, of the shell, and the thickness of the cover plate is equal to the height difference.
3. A fixing and sealing structure for a circuit board of an electronic expansion valve according to claim 2, wherein: the outer end face of the cover plate is provided with an auxiliary ring groove communicated with the sealing groove, and the sealing glue is arranged in the auxiliary ring groove.
4. A fixing and sealing structure for a circuit board of an electronic expansion valve according to any one of claims 1 to 3, wherein: the positioning portion is provided with a yielding inclined plane which is opposite to the inner annular wall of the sealing groove and is not in contact with the inner annular wall of the sealing groove.
5. A fixing and sealing structure for a circuit board of an electronic expansion valve according to any one of claims 1 to 3, wherein: the limiting groove is formed in the side wall of the circuit board, and the limiting column matched with the limiting groove is arranged on the inner side wall of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020654063.XU CN211982224U (en) | 2020-04-26 | 2020-04-26 | Electronic expansion valve circuit board is fixed and seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020654063.XU CN211982224U (en) | 2020-04-26 | 2020-04-26 | Electronic expansion valve circuit board is fixed and seal structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211982224U true CN211982224U (en) | 2020-11-20 |
Family
ID=73344740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020654063.XU Active CN211982224U (en) | 2020-04-26 | 2020-04-26 | Electronic expansion valve circuit board is fixed and seal structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211982224U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111447738A (en) * | 2020-04-26 | 2020-07-24 | 海力达汽车科技有限公司 | Electronic expansion valve circuit board is fixed and seal structure |
-
2020
- 2020-04-26 CN CN202020654063.XU patent/CN211982224U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111447738A (en) * | 2020-04-26 | 2020-07-24 | 海力达汽车科技有限公司 | Electronic expansion valve circuit board is fixed and seal structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9397431B2 (en) | Electrical connector and a method of manufacturing the same | |
| EP2191506B1 (en) | Wrap-around overmold for electronic assembly | |
| JP2559849B2 (en) | IC card | |
| US20050198819A1 (en) | Method of manufacturing a sealed electronic module | |
| JP4301048B2 (en) | Pressure sensor and manufacturing method thereof | |
| KR101543100B1 (en) | Controller intergrated fuel pump module | |
| JP2003149068A (en) | Pressure detector | |
| CN211982224U (en) | Electronic expansion valve circuit board is fixed and seal structure | |
| CN103336139B (en) | Modular sensor and manufacturing process thereof | |
| CN103721885B (en) | The ultrasonic atomizer of epoxy encapsulation | |
| CN101325183B (en) | Ultra-thin cavity type power module and encapsulation method thereof | |
| CN104316094A (en) | Rubber sealing type sensor and manufacturing process thereof | |
| JP2001201416A (en) | Method for manufacturing pressure detecting device | |
| CN111447738A (en) | Electronic expansion valve circuit board is fixed and seal structure | |
| CN204216020U (en) | The sealant sealing assembling structure of auto electronic element | |
| JP2000323865A (en) | Electronic circuit case | |
| CN105526956B (en) | Sensor arrangement and method for producing a sensor arrangement | |
| KR0154221B1 (en) | Process for the manufactur of detecting switch | |
| CN211982281U (en) | Electronic expansion valve circuit board sealing structure | |
| JP4942541B2 (en) | Electrical and electronic module and manufacturing method thereof | |
| CN209878795U (en) | Speed sensor structure | |
| CN216487561U (en) | Coil assembly and electronic expansion valve with same | |
| CN221199709U (en) | Programmable Hall rotation speed sensor | |
| CN116100742B (en) | Packaging technology of PCB and EPS torque sensor based on PCB | |
| JP3835317B2 (en) | Pressure sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |